Antifriction metal



UNITED STATES PATENT OFFICE.

WVILLIAM N. RUMELY, OF LA PORTE, INDIANA.

ANTIFRICTION METAL.

SPECIFICATION forming part of Letters Patent No. 550,293, dated November26, 1895.

Application filed January 7, 1895. Serial No. 534,088. (No specimens.)

To in whom it may concern.-

Be it known that 1, WILLIAM N. RUMELY, a citizen of the United States,residing in La Porte, in the county of La Porte and State of Indiana,have invented a new and useful Improvement in Antifriction Metal, ofwhich the following is a specification.

This invention relates to an improved composition of metals producing anantifriction alloy or bearing metal.

My composition consists of the following metals, in the proportionsubstantially as stated: Lead, fifty-two pounds; tin, thirtyfive pounds;antimony, twelve pounds; copper, one-half pound phosphor-tin, one-fourthpound.

In'mixing I first melt the copper; then add a sufficient quantity of thetin to bring the melting-point of the mixture to a point below themelting-point of antimony. The addition of five parts of the tin, byweight, to one part of the copper will produce this result. I cool thismixture, preferably casting it for convenience into small blocks orcubes. I then melt the antimony and put these cubes into it, where theybecome fused with the antimony. While this second mixture is in a meltedstate, I add the remainder of the tin to it, and also add the lead,mixing the whole thoroughly. IVhen these are thoroughly mixed, I add thephosphor-tin. WVhen this is fused, the metal mixture is poured intosuitable molds and cooled, and is then ready for use or for the market,making a most excellent antifriction alloy or metal for bearings.

I use phosphor-tin in this mixture for the convenience it aifords inadding the requisite amount of phosphorus. Instead of using phosphor-tinin the manner described, phosphorus itself may be added instead. Ifphosphorus is to be added instead of phosphor-tin, it should be put intothe copper when the copper is melted at the beginning of the process,putting in as much as the copper will take up, and then proceed as abovedescribed, except omitting the phosphor-tin.

The proportions above given may be considerably varied, more especiallyas to the proportion of the lead and the tin, which may vary quitewidely without changing the other ingredients, preferably increasingonefor example, the lead-in the proportion in which the other-forexample, the tinis reduced.

The copper and antimony may also be varied in like manner, increasingone and di minishing the other in like proportion according to thehardness desired.

' What I claim, and desire to secure by Letters Patent, is-

The anti-friction metal composition, consisting of lead, tin, antimony,copper and phosphorus, in proportions substantially as specified.

WILLIAM N. RUMELY.

Witnesses:

OSCAR VIRITORY, WM. S. Laws.

